Thanks David. Excellent point. I'll do that, but none the less, I'm pretty sure I haven't been maxing my upstream bandwidth.
I'm pretty sure it's the DLAM which is introducing the latency issue, so the only control I have to deal with it is through jitter buffers, and I don't control the buffer at the other end. FYI I've done a little ping testing of both my DSL line and some of my clients' cable connections with 5 different remote servers including 2 VOIP providers. Here is a summary of the last two hours of mine and one of my clients. (all times are in mS) DSL ------------ Google ISP DNS VOIP VOIP Latency(min) 31 8 91 12 17 Latency(max) 132 105 313 111 103 Latency(avr) 47 20 109 24 29 Jitter(max) 89 96 112 98 85 Pkt Loss(max) 0 0 0 0 5 MOS(min) 3.7 3.8 3.0 3.7 3.8 cable ------------ Google ISP DNS VOIP VOIP Latency(min) 35 12 19 15 15 Latency(max) 62 25 26 20 20 Latency(avr) 38 13 20 15 15 Jitter(max) 22 12 7 5 5 Pkt Loss(max) 0 0 0 0 0 MOS(min) 4.1 4.2 4.2 4.2 4.2 As you can see the cable is rock solid, but the DSL has a lot of jitter, and this is a fairly good sample for the DSL. On Sun, 2010-04-04 at 10:10 -0400, David Cook wrote: > Darryl, one other point. > > Make sure you are setting your max outbound bandwidth ~10% less than your > actual upstream bandwidth. If you _ever_ max this connection, the DSL > modem will buffer your packets and all QoS is for naught. --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
